On Sun, 19 Dec 1999 08:29:15 -0800 (PST) 
 eeh@one-o.com (Eduardo E. Horvath) wrote:

 > fas is an interesting proposition.  It's an enhanced esp with a DMA
 > engine all rolled into one.  It should be possible to get the current
 > esp driver to run it if only in narrow mode.  The problem is figuring
 > out how to get both the esp driver and the dma driver to attach to the
 > same OBP node without stepping on each other.  Ideally dma should bind
 > to the `SUNW,fas' OBP node and force it to bind to the same node or
 > somehow create a phony esp node, but I can't come up with a clean
 > solution.

That's not what you have to do.  What you do is create a new attachment
for ncr53c9x.c called "fas", which has its own DMA callbacks.  E.g., do
it like the "pcscp" driver (sys/dev/pci/pcscp.c).

It should be totally trivial to do.

        -- Jason R. Thorpe <thorpej@nas.nasa.gov>